You are working with Panotour (standard version) not Panotour Pro, I guess ?

This decoding issue will be fixed in nex release of Panotour .

It appears with plugins like the Thumbnails Bar or the Panorama List .

While waiting for newt release of Panotour, you can either remove those plugins from your tour, and use a Panorama Menu for example, or use the older version of Panotour.You can download it here : http://download.kolor.com/pt/stable/history